MESOSCALE DISCUSSION 0561
NWS STORM PREDICTION CENTER NORMAN OK
0701 PM CDT SUN MAY 08 2016
AREAS AFFECTED...WEST-CENTRAL OK AND WESTERN NORTH TX
CONCERNING...TORNADO WATCH 149...
VALID 090001Z - 090130Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 149 CONTINUES.
SUMMARY...WIDELY SCATTERED SPLITTING SUPERCELLS CAPABLE OF LARGE
HAIL...LOCALLY DAMAGING WINDS...AND TORNADO POTENTIAL WILL CONTINUE
TO SPREAD GENERALLY EAST-NORTHEASTWARD ACROSS SOUTHWEST OK AND
TOWARD MUCH OF CENTRAL OK THROUGH MID-EVENING. TORNADO WATCH 149
CONTINUES UNTIL 02Z/9PM CDT.
DISCUSSION...SPLITTING SUPERCELLS HAVE BEEN PREVALENT ACROSS THE
WESTERN HALF OF OKLAHOMA THROUGH LATE AFTERNOON/EARLY
EVENING...PRESUMABLY ATTRIBUTABLE TO RELATIVELY STRAIGHT HODOGRAPHS
ABOVE THE SURFACE. LARGE HAIL WILL REMAIN A DISTINCT POSSIBILITY
WITH THE LEFT-MOVING STORMS AMID AMPLE CLOUD-BEARING SHEAR/MODEST
BUOYANCY...WHILE ISOLATED TORNADO/LARGE HAIL AND LOCALLY DAMAGING
WIND POTENTIAL WILL EXIST IN THE SHORT-TERM WITH ANY RIGHT-MOVING
SUPERCELLS ESPECIALLY ACROSS SOUTHWEST/SOUTH-CENTRAL OK...SUCH AS
THE CURRENT /645 PM CDT/ SUPERCELL BETWEEN LAWTON AND THE
DUNCAN/MARLOW AREAS. A 56 KT WIND GUST WAS MEASURED AT LAWTON AT
AROUND 622 PM CDT/2322Z. EVEN WHILE LOW-LEVEL SHEAR WILL INCREASE
THIS EVENING...CONSIDERABLE/STABLE-CHARACTER CLOUD COVER HAS
PERSISTED ACROSS THE EASTERN HALF OF OK. CURRENT THINKING IS THAT
WEAK LOW-LEVEL PARCEL ACCELERATIONS SHOULD EVENTUALLY LEAD TO A
DIMINISHING INTENSITY TREND FOR MOST STORMS AS THEY PROGRESS TO
NEAR/EAST OF THE I-35 CORRIDOR.
..GUYER.. 05/09/2016
ATTN...WFO...FWD...OUN...
LAT...LON 36979867 36869721 33759755 34239959 35849937 36979867